vibration in front end w/new suspension

[Dcuzz23]

was riding my bike on street and when i hit 4th gear and started gaining mph my front wheels started vibrating llike crazy and got worst with more speed(almost impossible to hold onto bars). im guessing that the front end is out of alignment but the quad drives and stops straight. i spent a lot of time setting it up knowing i would have to adjust it but im unsure what adjustments are needed. i got fully adjustable asr a-arms+2+1.

 

i haven't messed with it yet. figured id ask yall first. :beer:

Edited November 9, 2006 by Dcuzz23

[racer]

well for one thing your tires arent balanced. that may have a lot to do with it, plus knobbies generally dont like high speeds on pavement.

[Mullet Man]

well for one thing your tires arent balanced. that may have a lot to do with it, plus knobbies generally dont like high speeds on pavement.

 

i dont know about all that, i max mine out on pavement and havent what he describes.

 

i would check to see if you front hub nuts are tight! if you can wiggle the tire around on the hub, they are loose! and can definately be the problem

[Dcuzz23]

i didn't change the rims and tires; the problem didn't exist until new a arms tie rods. the front hub bearings are brand new just did them. ill triple check em but they were tight. if they are tight ill swap front tires w/ a bud and see if still exists?

[Mullet Man]

i didn't change the rims and tires; the problem didn't exist until new a arms tie rods. the front hub bearings are brand new just did them. ill triple check em but they were tight. if they are tight ill swap front tires w/ a bud and see if still exists?

 

try swapping wheels/tires.

 

one thing i have learned thru my years of working on cars is this, when something goes wrong after performing maintenance work always go back and check the last thing you "fixed/changed". if it was multiple items fixed at one time, always start with them 1st.

your bearings would be a good place to start imo.

 

to me, it sounds like something in the hub. especially if it comes at higher speeds.

i dont think warped rotors would affect a quad like they do a car (because of the difference in mass) but i guess it is possible also...

 

got any pictures of your front suspension. maybe some guys could look at it for obvious errors/defects somewhere in the front end...

[ellison445]

I have had the same problem since I got my laegers and elkas. I have swaped wheels and made sure everything was tight and still the same thing. Mine isn't as bad as yours, but there is a slight vibration there.

[CFM]

I would put the quad up on a crate or something that lifts it off the ground and just check, double check everything.

 

There could be a ton of reasons for this problem ranging from a bent rim to the arms not properly set up...

 

When it's vibrating does it pitch the bars back and forth, or is it just a steady vibe?

[ellison445]

Mine is just a steady vibration.

 

I would put the quad up on a crate or something that lifts it off the ground and just check, double check everything.

 

There could be a ton of reasons for this problem ranging from a bent rim to the arms not properly set up...

 

When it's vibrating does it pitch the bars back and forth, or is it just a steady vibe?

[bigboybanshee]

Mine used to vibrate real bad on pavement with knobbies...same with my friend's quads. Hell, my banshee the way it is now with street tires vibrates at high speeds...I'm thinking about having the front wheels balanced cause at 80 mph on solid struts it's scary, lol. I agree with gimmeabeer :beer:

[odaen]

I just re-read your original post.

 

Make sure you have the right amount of camber/toe/caster dialed in with those adjustable arms.

 

Almost seems like a caster problem to me. Too much one way will cause some funky shit to happen. Think of a shopping cart where one of the wheels gets stuck the opposite way. It will cause all kinds of wobbling, vibration, etc trying to right itself and come around.

Edited November 9, 2006 by odaen

[kubiac3]

If you think its your a-arms then put the bike up on a crate, take the wheel off. Take a couple of peices of long angle iron and attach them to your front hubs and your rear hubs. Then take 2 peices and attach them across the front of the bike and the rear make sure there strait. Dont go off your bike for them to be strait, put a level on them or something like that. Now take measurements on each side to be sure each side is the same. Its basically like setting up a jig. I had to do that to mine when I got my extended a-arms, my frame is tweaked a bit in the front. Its def a super accurate way and pretty easy. takes about 30 minutes.

[06BaNsHeE]

That happend to me as soon as i got my holeshot hds.But I just put my stock tires back on and it rides perfectly.